Mysterious Equipment

[dcshoe]

I've a cab view screen capture posted at ftp://168.156.125.36/pub/mystery.jpg showing a mysterious object circled in red. Can anyone tell me what it is?
Many thanks.
V/R,
DC

[fastdash9]

I believe that's one of these things right here:

Subway.jpg

[paulytechnic]

Isn't that a collapsible barrier to prevent people on the station platform from falling between the cars?

[fastdash9]

I believe so. I couldn't think of a better word or explanation for its function, but I think you hit it right on the head with that.